What I understand about putting in new seals is that it doesn't address wear issues. I don't know enough about racks to know if there is excessive wear, and knowing myself, my own work may leak.
The 1st reason I did the rack was because it was leaking. The reason I did it this year was because I was having to replace ball joints that a previous shop had botched up, badly too. I knew I'd need an alignment, so I went ahead and did the rack.
If you have anyone do the job for you, make sure they use thread locker on all mounting bolts (required as per factory service manual), install new hoses, and a new ACDelco pump. Also, the pump should be first primed by hand. My pump is noisy. There is no air in the system, but the pump is a Fenco one, not ACDelco.